It has been estimated that as many as 975 million birds are killed each year in North America in collisions with glass windows and buildings. WindowAlert is a static-cling decal that may be applied to any window. The decals contain a component which brilliantly reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but glows like a stoplight for birds. Birds have vision that is up to 12 times better than we humans. Comes in a package of 4; each decal is approximately 4″ x 4″.

Butterfly or maple leaf designs.